Cut tripe into hand-sized pieces to facilitate rinsing. Rinse tripe in new clean water, drain, and repeat three more times. Add four quarts of water, salt, lemon juice, and tripe to a stainless steel sauce pot. Bring to boil over high heat. Once pot boils, skim off any foam. Cover pot and reduce heat to a medium flame. Simmer for 90 minutes until tripe is tender.